NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

3 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 939
METROPCS, INC. 3
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2018-07-31 939-295-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2018-07-25 939-237-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2018-07-25 939-293-1XXX 1000–1999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2018-07-25 939-293-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2018-07-25 939-422-7XXX 7000–7999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2018-07-25 939-422-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2018-07-20 939-577-1XXX 1000–1999Assigned METROPCS, INC. 5562 BAYAMONNOR PR
2018-07-19 939-236-6XXX 6000–6999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J RIOPIEDRAS PR
2018-07-10 939-210-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 CAGUAS PR
2018-07-03 939-638-3XXX 3000–3999Assigned METROPCS, INC. 5562 BAYAMONSUR PR
2018-06-27 939-588-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2018-06-15 939-577-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2018-06-15 939-638-0XXX 0000–0999Assigned METROPCS, INC. 5562 BAYAMONSUR PR
2018-06-15 939-638-1XXX 1000–1999Assigned METROPCS, INC. 5562 BAYAMONSUR PR
2018-06-12 939-355-3XXX 3000–3999Assigned METROPCS, INC. 5562 BAYAMONNOR PR
2018-05-30 939-355-1XXX 1000–1999Assigned SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2018-05-30 939-355-2XXX 2000–2999Assigned METROPCS, INC. 5562 BAYAMONNOR PR
2018-05-10 939-808-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 TRUJILLOAL PR
2018-05-03 939-745-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2018-04-27 939-652-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2018-04-27 939-845-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2018-04-24 939-292-1XXX 1000–1999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J LEVITTOWN PR
2018-04-18 939-441-0XXX 0000–0999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2018-04-18 939-441-1XXX 1000–1999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2018-04-18 939-441-2XXX 2000–2999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2018-04-18 939-441-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2018-04-18 939-441-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2018-04-18 939-441-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2018-04-18 939-441-6XXX 6000–6999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2018-04-18 939-441-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2018-04-18 939-478-0XXX 0000–0999Assigned SUNCOM DBA T-MOBILE USA 8645 CAYEY PR
2018-04-18 939-478-1XXX 1000–1999Assigned SUNCOM DBA T-MOBILE USA 8645 CAYEY PR
2018-04-18 939-478-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 CAYEY PR
2018-04-12 939-606-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 MAYAGUEZ PR
2018-04-11 939-299-2XXX 2000–2999Assigned SUNCOM DBA T-MOBILE USA 8645 MAYAGUEZ PR
2018-04-11 939-299-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 MAYAGUEZ PR
2018-04-11 939-299-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 MAYAGUEZ PR
2018-04-11 939-299-7XXX 7000–7999Assigned SUNCOM DBA T-MOBILE USA 8645 MAYAGUEZ PR
2018-04-10 939-344-0XXX 0000–0999Assigned SUNCOM DBA T-MOBILE USA 8645 SAN GERMAN PR
2018-04-10 939-344-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 SAN GERMAN PR
2018-04-04 939-525-7XXX 7000–7999Assigned SUNCOM DBA T-MOBILE USA 8645 SAN GERMAN PR
2018-04-04 939-525-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 SAN GERMAN PR
2018-03-23 939-239-5XXX 5000–5999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J CAGUAS PR
2018-03-23 939-716-1XXX 1000–1999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J CAGUAS PR
2018-03-23 939-716-2XXX 2000–2999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J CAGUAS PR
2018-03-23 939-716-3XXX 3000–3999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J CAGUAS PR
2018-03-21 939-499-6XXX 6000–6999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-03-16 939-588-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2018-03-16 939-625-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2018-03-09 939-209-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.